Butter
Embedded Sandboxes for Agents
Butter operates in b2b based in San Francisco, CA, USA, founded in 2020.
Profile
Butter is building bVisor, an incredibly lightweight sandbox runtime for AI agents.
It embeds directly into your local process, providing a safe bash environment without the overhead of VMs or remote infra.
Butter is positioned in b2b, a segment that rewards a clear, focused offering.
The company is recorded as being based in San Francisco, CA, USA.
Directory data places it at the Winter 2025 stage.
Recorded headcount: 2 employees.
Total disclosed funding stands at about $9M.
Directory analysis
Butter builds bVisor, a lightweight sandbox runtime that embeds directly into a local process to provide a secure bash environment for AI agents without the overhead of virtual machines or remote infrastructure. Founded in 2020 and headquartered in San Francisco, the company has raised $9 million in funding and operates with a small team of two employees. It targets B2B customers looking for efficient, on‑device sandboxing solutions for AI workloads.
Positioning: Butter positions itself as a developer‑centric tool for secure AI agent execution, competing with broader sandbox and DevOps platforms but differentiating through its ultra‑lightweight, process‑level integration. Its niche focus on local sandboxing may appeal to organizations prioritizing low‑latency, low‑resource security for AI applications.
Note: Butter provides a sandbox runtime that runs inside the host process, eliminating the need for virtual machines.
Auto-generated directory analysis from public data · updated 9 Oct 2026. Informational only, not investment advice.
| Sector | B2B |
|---|---|
| Headquarters | San Francisco, CA, USA |
| Country | USA |
| Founded | 2020 |
| Employees | 2 |
| Stage | Winter 2025 |
| Total funding | $9,000,000 |
Website: butter.dev
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